Circle Jerks (stylized as Ciʀcle JƎʀᴋs) were an American hardcore punk band, formed in 1979 in Los Angeles, California. The group was founded by former Black Flag vocalist Keith Morris and Red Kross guitarist Greg Hetson. They were among the pre-eminent hardcore punk bands of the LA scene in the late 1970s.The band broke up and reformed three times, sometimes with different bassists and/or drummers.